Hunger and fatigue. Your body converts the food you eat into glucose that your cells use for energy. But your cells need insulin to bring the glucose in.
Peeing more often and being thirstier. The average person usually has to pee between four and seven times in 24 hours, but people with diabetes may go a lot more.
Dry mouth and itchy skin. Because your body is using fluids to make pee, there's less moisture for other things. You could get dehydrated, and your mouth may feel dry. Dry skin can make you itchy.
Blurred vision. Changing fluid levels in your body could make the lenses in your eyes swell up. They change shape and lose their ability to focus.